Answer:
its b
Step-by-step explanation:
Answer:
I have solved this problem on paper (Find pictures attached)
Answer:
400 800 1200 1600 2000 is anwser
Answer: The answer is (d) 
Step-by-step explanation: Given equation to be factored is

The given expression is quadratic, so we can factor it into two linear factors, by using the following factorisation rule.

So, the given equation can be factorised using the above rule. The factorisation is as follows.

Thus, the correct option is (d).